Question

What is the y-intercept of f(x) = 3x 2? a. (9,0) b. (0,9) c. (0,-9) d. (9,-9)

Answer 1

F(X)=3x+9:y intercept is option C
F(X)=3x-9: y intercept is option B

Answer 2

f(x) = 3x + 9: y - intercept is option c. (0,-9)

f(x) = 3x - 9: y - intercept is option b. (0, 9)

Explanation:

option a and d cant be correct since y = 0 in those answer when the y - intercept is when x = 0

If the function f(x) = 3x + 9

than x = 0

f(x) = 3(0) + 9

f(x) = 0 + 9

f(x) = 9

x = 0 and y = 9 (0, 9)

If the function f(x) = 3x - 9

than x = 0

f(x) = 3(0) - 9

f(x) = 0 - 9

f(x) = -9

x = 0 and y = -9 (0, -9)