The y-intercept, in this case, represents when x is at 0, or when she just began observing.
When it's 5th to the power you do the number by itself how many times the power is so the correct way would be
10×10×10×10×10
Circumference of a circle is pi x diameter (full length of the circle)
you have the radius which is half, so youd need to double it go geth the diameter.
24x2=48
and then 3.14x48=150.72
I think you left out something, is it -4x+1
