MCAP PT Answer Key Math Grade 8 ACC - Practice Test Answer and Alignment

Sep 29, 2026

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Practice Test Answer and Alignment provides answer keys and evidence-statement key/content scope mappings for machine-scored items. It includes guidance that some items provide one possible sample student response while other valid solution methods may earn full credit when the item does not require a specific approach. It also explains how full vs. partial credit is determined during range-finding and notes that computation errors can still earn points for reasoning or modeling.

LanguageEnglish

CategoryExam

FormatPDF

Pages7

Reading Time18 min

AccessFree to download

Answer Key Alignment

Section 1

Section 2

Section 3

Section 4

Practice Test Answer and Alignment Document Mathematics: Grade 8 The following pages include the answer keys for all machine-scored items. A sample student response for the top score is included for all hand-scored constructed response items. • Some answer keys include one possible sample student response . Other valid methods for solving the problem can earn full credit unless a specific method is required by the item. • In items where the scores are awarded for full and partial credit, the definition of partial credit will be confirmed during range-finding (reviewing sets of real student work) . • If students make a computation error, they can still earn points for reasoning or modeling. Section 1 | Item Number | Answer Key | Evidence Statement Key/ Content Scope | | --- | --- | --- | | 1. | C | 8.EE.A.1 | | 2. | A, C, E | 8.F.A.1-1 | | 3. | B | 8.EE.A.2 | | 4. | C, D, G | 8.G.A.5 | | 5. | D | 8.NS.A.2 | | 6. | 16 | 8.EE.C.7b | | 7. | A, B, E | 8.NS.A.1 | | 8. | C | 8.F.A.3-1 | | 9. | 40 | 8.EE.A.3 | | 10. | B | 8.G.A.1a | | 11. | A | 8.EE.C.8a | | Item Number | Answer Key | Evidence Statement Key/ Content Scope | | --- | --- | --- | | 12. | D | 8.SP.A.2 | | 13. | A | 8.EE.C.7a | | 14. | A | 8.F.B.5-1 | | Item Number | Answer Key | Evidence Statement Key/ Content Scope | | --- | --- | --- | | 1. | 2.5 | 8.EE.C.8c | | 2. | B, D, E | 8.R.2a 8.F.A.3-1 | | 3. | D | 8.M.1
8.EE.C.8a
8.M.1d | | 4. | Sample Top Score Response Part A:
Linda’s claim is incorrect because she said the slope is run over rise . The slope is actually rise over run or the change in y over the change in x.
The slope of PR is − ~~ ~~2~~3~~ because 3 − (−1) 4 2
−3 − 3 = −6 = − 3 .
Part B:
Triangles MNP and QRT are similar because the corresponding angles at N and R and the corresponding angles at P and T are congruent, since they are corresponding angles where two parallel lines are intersected by a transversal. Because the triangles are similar, the ratios of corresponding sides of the triangles are equal. This means MNMP = QRQT~~ ~~ , and shows that the slopes of NP and RT are equal.
Refer to the Holistic Rubric for 4-Point Reasoning Constructed Response Items for score point information . | 8.R.1e
8.EE.B.6-1 | | 5. | 18 | 8.M.1
8.G.B.7
8.M.1a
8.M.1b
8.M.1c | Section 2 | Item Number | Answer Key | Evidence Statement Key/ Content Scope | | --- | --- | --- | | 6. | A, D | 8.F.A.2 | | 7. | B | 8.EE.B.6-1 | | Item Number | Answer Key | Evidence Statement Key/ Content Scope | | --- | --- | --- | | 1. | C | 8.G.B.7 | | 2. | B, C, D | 8.SP.A.4 | | 3. | Sample Top Score Response
Let d represent the number of days student K reads.
The number of pages student J reads is 20d + 40 and the number of pages student K reads is 30d. The equation 20d + 40 = 30d could be used to determine the number of days after student J starts reading when both students have read the same number of pages.
Solving for d results in d = 4, which means the students will have read the same number of pages 4 days after student K starts reading.
Refer to the Holistic Rubric for 3-Point Modeling Constructed Response Items for score point information . | 8.M.1
8.EE.C.7b
8.M.1b
8.M.1c | | 4. | B | 8.M.1
8.EE.B.5-1
8.M.1a | Section 3 | Item Number | Answer Key | Evidence Statement Key/ Content Scope | | --- | --- | --- | | 5. | Sample Top Score Response
The length of leg PQ can be found using 32 + 42 , which is equal to 5 units.
The length of leg QR can be found using 62 + 82 , which is equal to 10 units.
It is given that the length of hypotenuse PR is 125 units. Then, using the Pythagorean Theorem where a = 5 and b = 10 to verify that triangle PQR is a right triangle:
a2 + b2 = c2
52 +102 = c2
25 +100 = c2
125 = c2
125 = c
Since c = 125 and PR = 125 , triangle PQR is a right triangle.
Refer to the Holistic Rubric for 3-Point Reasoning Constructed Response Items for score poi

FAQs

What information does the document provide for machine-scored items?

It provides answer keys and the corresponding evidence statement key/content scope for each item number.

Are there cases where a single sample student response is shown?

Yes. Some answer keys include one possible sample student response for the top score, but other valid solution methods can still earn full credit unless the item requires a specific method.

How are partial credit scores determined?

In items awarding full and partial credit, the definition of partial credit is confirmed during range-finding by reviewing sets of real student work.

Sep 29, 2026

Upload by sagouaw