Practice Test GeeksSBAC Practice Test
← All SBAC Flashcard Decks

Grade 8 Math Flashcards

7 cards from real SBAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Grade 8 Math flashcards as text

  1. Which relation is a function?

    Answer: {(1,2),(2,3),(3,4)}

    Each input maps to exactly one output, so it is a function.

  2. For f(x) = 2x + 1, what is f(5)?

    Answer: 11

    Substitute 5: 2(5) + 1 = 11.

  3. A linear function has rate of change 3 and starts at 4. What is its equation?

    Answer: y = 3x + 4

    Rate of change is the slope (3) and the start value is the y-intercept (4).

  4. Which function is nonlinear?

    Answer: y = x^2

    y = x^2 has a variable exponent of 2, making it nonlinear.

  5. A function increases by 5 for every increase of 1 in x. What is its slope?

    Answer: 5

    Slope is the change in y per unit change in x, which is 5.

  6. Compare functions A: y = 2x + 1 and B: y = 3x + 1. Which has the greater rate of change?

    Answer: B

    B has slope 3, which is greater than A's slope of 2.

  7. For f(x) = x^2 - 4, what is f(3)?

    Answer: 5

    Substitute 3: 3^2 - 4 = 9 - 4 = 5.