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Year 10 Gradient and Linear Equations Worksheet — Level 1 — Practice Set 4 — Answers

Answer sheet with worked solutions for the Year 10 linear relationships & graphs worksheet.

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Year 10 Gradient and Linear Equations Worksheet — Level 1 — Practice Set 4 — Answers

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

1.Find the gradient of the line through (2, 1) and (7, 16).

Answer: 3

  1. gradient = rise ÷ run = (16 − 1) ÷ (7 − 2)
  2. = 15 ÷ 5 = 3
2.For the line y = 5x − 9, write the gradient and the y-intercept.

Answer: gradient 5; y-intercept −9

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

Answer: gradient −2; 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.

4.For the line y = 4x − 4, write the gradient and the y-intercept.

Answer: gradient 4; y-intercept −4

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

5.Find the gradient of the line through (−6, 6) and (−11, 21).

Answer: −3

  1. gradient = rise ÷ run = (21 − 6) ÷ (−11 − (−6))
  2. = 15 ÷ −5 = −3
6.Find the gradient of the line through (−6, −2) and (−11, −12).

Answer: 2

  1. gradient = rise ÷ run = (−12 − (−2)) ÷ (−11 − (−6))
  2. = −10 ÷ −5 = 2
7.Find the gradient of the line through (3, 4) and (1, 10).

Answer: −3

  1. gradient = rise ÷ run = (10 − 4) ÷ (1 − 3)
  2. = 6 ÷ −2 = −3
8.For the line y = −3x − 2, write the gradient and the y-intercept.

Answer: gradient −3; y-intercept −2

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

9.Find the gradient of the line through (−4, 0) and (−8, 8).

Answer: −2

  1. gradient = rise ÷ run = (8 − 0) ÷ (−8 − (−4))
  2. = 8 ÷ −4 = −2
10.Find the gradient of the line through (4, 0) and (3, −3).

Answer: 3

  1. gradient = rise ÷ run = (−3 − 0) ÷ (3 − 4)
  2. = −3 ÷ −1 = 3
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