Question

Please help.

Answer 1

To find the smallest y-value, you substitute x=0 into each other the functions.

For function a(x), do a(0):
a(0) = (0+5)2-7 = 3

For function b(x), it gives you (0,6).

For function c(x), just look at where the line crosses the x-axis. It crosses it as -2, and there's a point at (0,-2).

So since -2 is the smallest, function c(x) has the smallest y-intercept: -2