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[egarcia]

What is the y-intercept of the function y = 1,500(2.15)x?
sorry i don't know how to make a small x. but its supposed to represent an exponent.
My guess to this is that the y-intercept is 3225 but I'm not sure

 

[Mrspi]

What is the y-intercept of the function y = 1,500(2.15)x?
sorry i don't know how to make a small x. but its supposed to represent an exponent.
My guess to this is that the y-intercept is 3225 but I'm not sure

You can use " ^ " to indicate an exponent. So, 2.15 raised to the x power can be written as 2.15^x

And your problem could be written this way: y = 1500*2.15^x

As I suggested earlier, to find the y-intercept for any graph (assuming it HAS one) substitute 0 for x.

y = 1500 * 2.15[sup:1loh4vxh]x[/sup:1loh4vxh]


y = 1500*2.15[sup:1loh4vxh]0[/sup:1loh4vxh]

Now...you are expected to know what is ALWAYS the result when you raise any nonzero number to the power of 0.