Question

Write the slope-intercept form of the line that passes through the points (7,14) and (9,18).

Answer 1

to find the slope, use the two points given.

slope=m=y2-y1/x2-x1= 18-14/9-7= 4/2=2

now plug everything into the y=mx=b equation

y=2x+b (substitute x and y using any of the two coordinates)

14=2(7)+b (isolate for b to find intercept)
b= 0

so the equation is y=2x (since b=0)