# Westport

Districts Schools ## 2019 Item by Item Results for GRADE 08 MATHEMATICS

### Number of Students Included: 111

 Westport - GRADE 08 MATHEMATICS ITEM INFORMATION PERCENT OF DISTRICT'S POSSIBLE POINTS ITEM TYPE REPORTING CATEGORY STANDARD ITEM DESC POSSIBLE POINTS WESTPORT STATE DISTRICT-STATE DIFFERENCE 1 SA NSEE 8.EE.A.4 Convert a number given in scientific notation to a number in standard notation. 1 81% 68% 13 2 SR NSEE 8.NS.A.2 Identify a point on a number line that corresponds to the approximate location of an irrational number. 1 80% 62% 18 3 SR NSEE 8.EE.A.1 Use the properties of integer exponents to determine an expression equivalent to a given expression. 1 79% 63% 16 4 SR NSEE 8.EE.C.7 Determine the solution to a linear equation by using the distributive property. 1 61% 47% 14 5 CR FN 8.F.A.2 Compare properties of two different functions, representing real-world contexts, graphically and verbally; write equations that represent functions. 4 76% 65% 11 6 SR NSEE 8.NS.A.2 Determine the location of an irrational number between two rational numbers on a number line. 1 73% 60% 13 7 SR NSEE 8.EE.A.3 Determine how many times greater one number is than another when both are expressed as single digits multiplied by integer powers of ten. 1 46% 44% 2 8 SA NSEE 8.EE.A.1 Apply the properties of integer exponents to simplify a given expression. 1 32% 23% 9 9 SR NSEE 8.EE.C.7 Solve a pair of linear equations expressed as verbal descriptions. 1 74% 70% 4 10 SR GE 8.G.A.5 Determine the measure of an unknown angle in a figure containing two parallel lines cut by a transversal. 1 88% 79% 9 11 SA GE 8.G.B.7 Choose side lengths to create a right triangle. 1 80% 67% 13 12 SR GE 8.G.A.3 Determine the coordinates of the image of a vertex of a polygon after the polygon has been reflected over the x-axis. 1 90% 83% 7 13 SA GE 8.G.A.5 Given parallel lines cut by a transversal, select all angles that must be congruent to one of the angles. 1 81% 72% 9 14 SR NSEE 8.EE.B.5 Interpret and compare proportional relationships on a graph, and identify an equation to represent the relationship. 1 67% 55% 12 15 CR SP 8.SP.A.4 Interpret a two-way table to answer statistical questions about categorical data collected from the same subjects. 4 40% 39% 1 16 SA GE 8.G.A.3 Transform a two-dimensional figure on a coordinate plane. 1 84% 70% 14 17 SR GE 8.G.C.9 Determine the volume of a sphere. 1 79% 57% 22 18 SR FN 8.F.B.5 Analyze a graph of a functional relationship to determine if different statements are true; then select another graph that exhibits a different qualitative feature of the functional relationship. 2 37% 32% 5 19 SR GE 8.G.B.8 Determine the length of a side of a right triangle graphed on the coordinate plane by using the Pythagorean Theorem. 1 41% 38% 3 20 SR GE 8.G.A.4 Determine which measurements belong to a triangle similar to a given triangle. 1 71% 58% 13 21 SR SP 8.SP.A.1 Determine which scatter plot matches a given description that includes information about linearity and direction of correlation. 1 94% 88% 6 22 SR NSEE 8.EE.A.1 Determine which expression with an exponent is equivalent to a given expression featuring multiplication of two numbers with the same base but different exponents. 1 67% 59% 8 23 SR NSEE 8.NS.A.2 Determine between which pair of integers a square root of a given number lies. 1 90% 71% 19 24 CR NSEE 8.EE.C.8 Given the graph of a system of linear equations, solve the system, write the equation of a graphed line, and determine whether a third line passing through two given points will intersect the line. 4 65% 49% 16 25 SA NSEE 8.NS.A.1 Convert a fraction to a decimal. 1 38% 30% 8 26 SA NSEE 8.EE.A.1 Apply the properties of integer exponents to generate an equivalent expression when one exponent is positive and the other exponent is negative. 1 79% 60% 19 27 SR FN 8.F.B.4 Determine the rate of change from a verbal description of a proportional relationship, and use that rate of change to solve a real-world problem. 1 60% 55% 5 28 SR NSEE 8.EE.A.1 Use the properties of integer exponents to determine an expression equivalent to a given expression. 1 39% 40% -1 29 SA NSEE 8.EE.B.5 Graph a real-world proportional relationship and identify an equation to represent a related relationship. 2 80% 74% 6 30 SA FN 8.F.B.5 Analyze a graph where a function is increasing and decreasing. 1 50% 38% 12 31 SA NSEE 8.EE.A.3 Given two quantities, each expressed as a single digit multiplied by an integer power of ten, determine how many times as much one quantity is than the other. 1 52% 44% 8 32 SR SP 8.SP.A.3 Interpret the meaning of the slope in a linear equation. 1 54% 48% 6 33 SR GE 8.G.A.3 Determine the coordinates of the image of a vertex of a polygon after the polygon has been reflected over the y-axis. 1 89% 73% 16 34 SR FN 8.F.A.2 Compare properties of two functions represented algebraically and in a table and interpret each function's rate of change and initial value. 1 77% 68% 9 35 CR GE 8.G.A.1 Given a polygon and its image after a transformation, verify congruence by analyzing properties of both; describe a series of transformations that would result in the same image of the polygon. 4 48% 47% 1 36 SR FN 8.F.B.4 Determine which graph has a given slope. 1 78% 72% 6 37 SR GE 8.G.B.7 Use the Pythagorean Theorem to solve a problem with real-world context. 1 68% 65% 3 38 SA GE 8.G.A.2 Determine the measure of an unknown angle in a figure by using facts about similarity. 1 35% 41% -6 39 SR FN 8.F.A.1 Identify y as a function of x from given input/output tables. 1 60% 35% 25 40 SR GE 8.G.A.5 Determine which angles are congruent when two parallel lines are intersected by a transversal. 1 93% 79% 14