Question

Write the equation of the line that passes through each pair of points in slope-intercept form. (0, -6) and (3, 15)

Answer 1

The gradient is difference in y coordinates / difference in x-coordinates so
15 - (-6) / 3 -0 = 21 / 3 = 7.

Then if equation of a line is y = mx + c, then rearranging c = y - mx
choose your any point for the y and x coordinates, for example (3,15)
to find the y-intercept.
so if m=7
x = 3
y = 15
and equation c = y-mx
what is c?

Answer 2

Have you understood ?

Answer 3

lol why write it all out again? :D