Question

What function equation is represented by the graph?

A. f(x)=4x+4
B. f(x)=4x+5
C. f(x)=3x+5
D. f(x)=3x+4

Answer 1

D. f(x)=3^x+4

Explanation:

Answer 2

D. f(x)=3^x+4

Explanation:

The graph crosses the y axis at 5 so the y intercept is 5

Anything to the zero power is 1

A. f(0)=4^0+4 = 1+4 =5

B. f(0)=4^0+5 =1+5 =6

C. f(0)=3^0+5 =1+5 =6

D. f(0)=3^0+4=1+5 =5

We can eliminate choices b and c

A. f(x)=4^x+4

D. f(x)=3^x+4

Let x = 2, y = is between 12 and 14

A. f(2)=4^2+4=16+4 =20

D. f(2)=3^2+4=9+4 = 13

So A is eliminated