Question

Which equation represents exponential growth? A)Y=2x or B)Y=3(5)^ or C)y=4x2 or D)Y= 2(0.5)x

Answer 1

Answer:

B)

Step-by-step explanation:

Why A Doesn't Work:

y=mx+b is a linear equation.

y=2x, y=2x+0 which is a linear equation.

Why C doesn't work:

Anything with x² in it is a parabola. Anything.

4x² is a parabola, not an exponential equation.

Check for yourself on Desmos.

Why D doesn't work:

2(0.5)x

2(0.5) = 1

(1)x = 1x

y=1x,  y = 1x+0 = LINEAR

Why B Works:

I do not understand what B is supposed to be, but I suppose it is correct by using the process of elimination.

Hope this helps :)

-jp524