Grade 8 · Math

8th grade Graph a line from y = mx + b, and make a table of values worksheet

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Graph a line from y = mx + b, and make a table of values

Grade 8 Math Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

Milo fills a table of values for y = 1.5x − 2. What is y when x = 6?
Noah graphs y = 2x ÷ 3 + 2, starting where the line meets the y-axis. Which is the next point to the right with whole-number coordinates?
Pia graphs y = -3x ÷ 4 + 5, starting where the line meets the y-axis. Which is the next point to the right with whole-number coordinates?
Ren graphs y = 5x ÷ 2 − 4, starting where the line meets the y-axis. Which is the next point to the right with whole-number coordinates?
5.
Tala checks points for the line y = 3x ÷ 5 − 1. Which point is on the line?
- (5, 10)
- (10, 5)
- (10, 6)
- (10, 29)
6.
Ari checks points for the line y = -x ÷ 2 + 3. Which point is on the line?
- (8, 7)
- (8, -4)
- (-1, 8)
- (8, -1)
Bo's line crosses the y-axis at -2 and rises 3 for every 4 across. What is y on the line at x = 12?
Esme's line crosses the y-axis at 5 and falls 2 for every 3 across. What is y on the line at x = 9?
9.
Luz plots (0, 4), (1, 2) and (3, -1) for y = -2x + 4. One point is wrong. Which one, and what should it be?
- None: all three points are right
- (0, 4): the line should start at (0, -2)
- (1, 2): it should be (1, 6)
- (3, -1): it should be (3, -2)
10.
Milo plots (0, 1), (2, 2) and (4, 4) for y = x ÷ 2 + 1. One point is wrong. Which one, and what should it be?
- (2, 2): it should be (2, 3)
- (4, 4): it should be (4, 3)
- (2, 2): it should be (2, 5)
- None: all three points are right

Graph a line from y = mx + b, and make a table of values. Every version has 10 questions, and the answer key prints on the second page.

I can fill a table of values from y = mx + b, including negative and fraction slopes.
I can start at (0, b) and step along the line to a new point: across 1, change y by m (or across the bottom of a fraction slope and up its top).
I can check whether a point is on a line, and find the plotted point that is wrong.

Standard: 8.F.A.3 (partial)

table of values: Rows of x and y that the rule makes.

point (x, y): A row drawn on the grid: across x, then up (or down) y.

y-intercept: The point (0, b) where the line meets the y-axis.

slope step: Go 1 to the right and change y by m.

whole-number point: A grid point; for y = 2x ÷ 3 + 2 the next one is 3 to the right.

Your child multiplied by the slope but did not add the starting value. In y = 3x + 2, ask: what is y when x is 0?

Your child added the slope to x instead of multiplying.

Your child used the slope as the start and the start as the slope. In y = 3x + 2, ask: which number goes with x?

Ask: what does 3x mean?

What is the most common mistake with graph a line from y = mx + b, and make a table of values?

Your child multiplied by the slope but did not add the starting value. In y = 3x + 2, ask: what is y when x is 0?

Are these 8th grade math worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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