Equation of a Straight Line

What does "m" represent in y=mx+c?

• y-intercept

• gradient

• macaroni

• nothing

What does 'c" represent in y=mx+c

• y-intercept

• constant

• nothing

• gradient

Which point does NOT lie on the line

2y + 5x - 4 = 0?

• (0.8, 0)

• (-1, 0.5)

• (0,2)

• (2,-3)

P is the point (2,7), Q is the point (6,-3).

What is the gradient of PQ?

• 0.4

• -0.4

• 2.5

• -2.5

P is the point (4,-2). Q is the point (-3, -5).

What is the length PQ?

• √50

• √98

• √40

• √58

P is the point (3,5). Q is the point (-1,9). R is the midpoint of PQ.

Which one of the following lines does R lie on?

• y = x + 6

• y = x + 8

• y = x - 6

• y = x - 8

What is the equation of this line?

• y = 2x + 5

• y = -2x + 5

• y = -2x

• y = 5

The diagram shows a sketch of one of the following lines. Which one?

• y – x + 1 = 0

• y = x + 1

• y + x = 1

• y + x + 1 = 0

A straight line has equation

10y = 3x + 15.

Which of the following is true?

• The gradient is 0.3 and the y-intercept is 1.5

• The gradient is 3 and the y-intercept is 15

• The gradient is 15 and the y-intercept is 3

• The gradient is 1.5 and the y-intercept is 0.3

Here are four straight line equations.

1)3y = 4x + 5

2) 4y = 3x - 1

3) 4 y + 3x = 7

4) 4x + 3y = 2

Which one of the following statements is true?

• Lines 1 and 2 are perpendicular

• Lines 1 and 4 are parallel

• Lines 2 and 4 are perpendicular

• Lines 2 and 3 are parallel