Question

Find f(3). f(x) = x2 + 5x - 9 The equation y = 2x + 1 is changed to y = 2x - 1.

How does this change the graph of the line?

A) The original line will shift down 1 unit.
Eliminate
B) The original line will shift left 1 unit.
C) The original line will shift left 2 units.
D) The original line will shift down 2 units.

Answer 1

f(x)=15

D

Explanation:

f(x)=x2+5x-9

f(3) means to substitute 3 for x in the equation.

3^2+5(3)-9

9+15-9

f(x)=15

y=mx+b

b is the y intercept, so changing it to -1 would shift the line down 2 units. you