VTCAP Grade 8 Functions. Practice it free.

Grade 8 Functions standards; reported as the 'Functions' performance indicator. Blueprint target: 10-16 points (18-29% of the grade 8 test). This Grade 8 reporting domain maps to 4 practice skills and 8 representative questions from the playable bank.

Grade 88.F4 mapped skills
What the test measures

Functions skills

  1. Define, evaluate, and compare functions

  2. Use functions to model relationships between quantities

Standards basis

Common Core State Standards for Mathematics (CCSS-M) — Vermont

How the VTCAP reports it

Vermont administered the Smarter Balanced summative through spring 2022, then replaced it with the Cognia-developed Vermont Comprehensive Assessment Program (VTCAP) beginning spring 2023 — this landing slug predates the switch. VTCAP mathematics is an adaptive, CCSS-M-aligned assessment in grades 3-9. It is NOT a Smarter Balanced administration: its reporting categories are groupings of the CCSS grade-level domains (e.g. 'The Number System, Expressions and Equations'), not SBAC claims, though two cross-grade Mathematical Practices indicators ('Problem Solving, Reasoning, and Argument'; 'Modeling, Patterns, and Structure') echo the old claim structure. Per the test specifications, the grades 3-8 test may assess any CCSS-M standard at the grade; the grade 9 test assesses a prioritized subset of the high school CCSS-M within the conceptual categories of Number and Quantity, Algebra, Functions, Geometry, and Statistics and Probability (the assessed focus areas are published in the grade 9 Performance Level Descriptors).

Blueprint & weighting

VTCAP Test Specifications (Spring 2026) operational test blueprint, target percent of points per grade — Grade 3: OA 24-35%, NBT 10-14%, NF 16-20%, MD 22-29%, G 6-10%, constructed-response Mathematical Practices 12%. Grade 4: OA 20-31%, NBT 16-20%, NF 20-31%, MD 12-20%, G 6-10%, practices 12%. Grade 5: OA 14-22%, NBT 14-25%, NF 22-29%, MD 20-27%, G 8-16%, practices 12%. Grade 6: RP 15-22%, NS 15-22%, EE 15-22%, G 11-19%, SP 11-19%, practices 11%. Grade 7: RP 15-22%, NS 11%, EE 15-30%, G 11-19%, SP 19-22%, practices 11%. Grade 8: F 18-29%, NS 7%, EE 20-31%, G 18-29%, SP 18-22%, practices 11%. Grade 9 (all machine-scored): Number and Quantity/Algebra 18-27%, Algebra/Functions 31-40%, Geometry 20-29%, Statistics and Probability 13-20%; the two practices indicators are dual-aligned targets of >18% of points each. Identical figures appear in the Spring 2025 specifications.

Try it now

8 free questions · 0/0 correct

Practice playeasy

What is the slope of the line y=32x+2y = \dfrac{3}{2}x + 2?

In y=mx+by = mx + b, the slope is m=32m = \dfrac{3}{2}.

Practice playmedium

Consider the linear function tt given by t(x)=nx+150t(x) = nx + 150, where nn is a constant. Knowing that t(10)=80t(10) = 80, determine t(20)t(20).

Substitute x=10x = 10: 10n+150=8010n + 150 = 80, so 10n=7010n = -70 and n=7n = -7. The rule is t(x)=7x+150t(x) = -7x + 150, so t(20)=7(20)+150=140+150=10t(20) = -7(20) + 150 = -140 + 150 = 10.

Practice playeasy

An amusement park charges $12\text{\char36}12 for admission and $3\text{\char36}3 for each ride. Let xx be the number of rides and yy be the total cost in dollars. Which equation models the situation?

Admission is the starting cost ($12\text{\char36}12) and each ride adds $3\text{\char36}3, so y=3x+12.y = 3x + 12\textsf{.}

Practice playeasy

What is the slope of the line through (1,2)(1, 2) and (3,8)(3, 8)?

Slope =8231=62=3.= \dfrac{8 - 2}{3 - 1} = \dfrac{6}{2} = 3\textsf{.}

Practice playeasy

What is the yy-intercept of the line y=34x5y = \dfrac{3}{4}x - 5?

In y=mx+by = mx + b, the yy-intercept is b=5b = -5.

Practice playmedium

For the function v(x)=6x+kv(x) = 6x + k with constant kk, it is known that v(7)=30v(7) = 30. What number does v(4)v(4) equal?

Substitute x=7x = 7: 6(7)+k=306(7) + k = 30, so 42+k=3042 + k = 30 and k=12k = -12. The rule is v(x)=6x12v(x) = 6x - 12, so v(4)=6(4)12=2412=12v(4) = 6(4) - 12 = 24 - 12 = 12.

Practice playeasy

Elena already has $75\text{\char36}75 in her savings account and deposits $20\text{\char36}20 each week. Let xx be the number of weeks and yy be the account balance in dollars. Which equation models the situation?

She starts at $75\text{\char36}75 (intercept) and gains $20\text{\char36}20 per week (slope), so y=20x+75.y = 20x + 75\textsf{.}

Practice playeasy

What is the slope of the line through (0,5)(0, 5) and (4,3)(4, -3)?

Slope =3540=84=2.= \dfrac{-3 - 5}{4 - 0} = \dfrac{-8}{4} = -2\textsf{.}

Keep practicing

Turn functions into game time.

The VTCAP placement starts with this test's real coverage map and finds the right difficulty.