Question

Which is an equation of the line that passes through the points (-1,9) and (4, 24)?

y = 3x + 12
D
B
y= kx + 12
y= 1x – 4
С
D
y = 3.2 – 4

Answer 1

y = 3x + 12

Explanation:

Slope (m) = 24-9/4-(-1)

= 25/5

= 3

Using point (-1 , 9)

y - y1 = m (x - x1)

y - 9 = 3 (x - -1)

y - 9 = 3 (x + 1)

y - 9 = 3x + 3

y = 3x + 3 + 9

y = 3x + 12