Question

Suppose that f(x)=8x+1. Complete parts (a) through (f).

(a) What is the slope?
(b) What is the y-intercept?
(c) What is the zero of f?
(d) Solve f(x)=9. What point is on the graph of f? The solution to f(x)=9 is ____ (type an ordered pair)
The corresponding point on the graph is ____ (type an ordered pair)
(e) Solve f(x)≤-7. The solution is ____ (type your answer in interval notation)
(f) Graph f.

Answer 1

f(x) = 8x + 1
a) The slope is the number on the x which is 8
b) y-intercept is added (or subtracted) to the x which is 1
c) f(0) = 8(0) + 1 = 1
d) 9 = 8x + 1
8 = 8x
x = 1 - solution
(1, 9) - ordered pair
e)
-7 <= 8x + 1
-8 <= 8x
-1 <= x
x => -1

I'll let you graph f(x)