Answer:
y = x-20
Explanation:
finding the equation of the line
get 2 points A and B , they are an on the line
make sure its in the form (x,y)
A = (0 , -20)
B = ( 70 , 50)
now get the gradient
gradient =
![(y2-y1)/(x2-x1)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/flm5n96lsu1pl0daqmknr0jcmu4wjdbkcc.png)
=
![(50 - - 20)/(70-0)](https://img.qammunity.org/2021/formulas/mathematics/high-school/otfousn7df21zzxqfdfx7qu0o2vaf4okpl.png)
= 70/70
gradient = 1
now make the equation
m is the gradient
y- y1 = m (x-x1)
y- -20 = 1 (x - 0)
y + 20 = x
put in the form y = mx +c
therefore
y = x - 20