Question

Goes through (3,5) and (8,20) write in point slope form or slope intercept form

Answer 1

y = 3x - 4

Explanation:

the given co-ordinates are:

x1, y1 = 3, 5

x2, y2 = 8, 20

the equation of the slope intercept form of a line is:

y = mx + c

where slope, m = y2 - y1 / x2 - x1

= 20 - 5 / 8 - 3

= 15/5 = 3

let's take x1, y1 back in the equation to find constant, c

5 = 3(3) + c

c = 5 - 9 = -4

thus, the equation of a line in point slope form is:

y = 3x - 4