Question

Find the y- intercept of f(x)=5x-20

Answer 1

f = 5 + -20x-1

Explanation:

Simplifying

f(x) = 5x + -20

Multiply f * x

fx = 5x + -20

Reorder the terms:

fx = -20 + 5x

Solving

fx = -20 + 5x

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by 'x'.

f = -20x-1 + 5

Simplifying

f = -20x-1 + 5

Reorder the terms:

f = 5 + -20x-1

Answer 2

f(0)=5(0)-20

f(0)= -20

y- intercept is (0,-20)