find the x and y intercepts for -5x + 4y = 20

Question

once I know the x and y intercepts i can graph it.

 

Answer 1

To find the X intercept, set Y to zero.  To set the Y intercept, set X to zero,

 

-5X + 4Y = 20    -5X + 4(0) = 20      -5X = 20 Divide both sides by -5.   X intercept = -4

 

-5(0) + 4Y = 20    4Y = 20  Divide both sides by 4.    Y = 5