Exponential function has the form y=ab^x, when x=1, y=7.5, so ab=7.5, equation1
When x=3, y=ab^3=16.875, equation 2
Let a=7.5/b, plug it in equation 2, y=7.5b^2=16.875, b=1.5
So a=7.5/1.5=5
So y=5*1.5^x
Answer:
Step-by-step explanation:
i think D
The missing number is 29
Hey!
You can make a proportion:
Cross multiply
Divide by 2
<em>5 pounds would cost $10.50</em>
Good luck and hope this helps! :)