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Year 8 Gradient and Linear Equations Worksheet — Level 1 — Answers

Answer sheet with worked solutions for the Year 8 linear relationships & graphs worksheet.

Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · Linear Relationships & Graphs

Year 8 Gradient and Linear Equations Worksheet — Level 1 — Answers

Show your working. Gradient = rise ÷ run; the equation of a line can be written as y = (gradient)x + (y-intercept).

1.For the line y = −6x + 6, write the gradient and the y-intercept.

Answer: gradient −6; y-intercept 6

In y = (gradient)x + (y-intercept), the number multiplying x is the gradient and the constant is where the line crosses the y-axis.

2.For the line y = x + 7, write the gradient and the y-intercept.

Answer: gradient 1; y-intercept 7

In y = (gradient)x + (y-intercept), the number multiplying x is the gradient and the constant is where the line crosses the y-axis.

3.Find the gradient of the line through (6, −3) and (2, 9).

Answer: −3

  1. gradient = rise ÷ run = (9 − (−3)) ÷ (2 − 6)
  2. = 12 ÷ −4 = −3
4.Find the gradient of the line through (2, −3) and (7, −18).

Answer: −3

  1. gradient = rise ÷ run = (−18 − (−3)) ÷ (7 − 2)
  2. = −15 ÷ 5 = −3
5.Find the gradient of the line through (5, −3) and (6, −2).

Answer: 1

  1. gradient = rise ÷ run = (−2 − (−3)) ÷ (6 − 5)
  2. = 1 ÷ 1 = 1
6.For the line y = −4x + 8, write the gradient and the y-intercept.

Answer: gradient −4; y-intercept 8

In y = (gradient)x + (y-intercept), the number multiplying x is the gradient and the constant is where the line crosses the y-axis.

7.For the line y = 5x − 3, write the gradient and the y-intercept.

Answer: gradient 5; y-intercept −3

In y = (gradient)x + (y-intercept), the number multiplying x is the gradient and the constant is where the line crosses the y-axis.

8.Find the gradient of the line through (6, 3) and (5, 6).

Answer: −3

  1. gradient = rise ÷ run = (6 − 3) ÷ (5 − 6)
  2. = 3 ÷ −1 = −3
9.Find the gradient of the line through (−1, 1) and (−3, −5).

Answer: 3

  1. gradient = rise ÷ run = (−5 − 1) ÷ (−3 − (−1))
  2. = −6 ÷ −2 = 3
10.Find the gradient of the line through (4, −3) and (2, −9).

Answer: 3

  1. gradient = rise ÷ run = (−9 − (−3)) ÷ (2 − 4)
  2. = −6 ÷ −2 = 3
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