Question

Help please. I think the slope is 9, and that's as far as I got

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Answer 1

The graph of x = 9 is simply a vertical line through 9 on the x axis. All vertical lines have undefined slopes.

Anything perpendicular to vertical lines are horizontal lines. All horizontal lines have a slope of 0.

Answer 2

If the point is at (-9, 3) and has a slope of zero, then that indicates that the y intercept is 3.

Answer 3

I got y=0x+3

Answer 4

y = 0x+3 turns into y = 0+3 which simplifies to y = 3

Answer 5

keep in mind that 0*x = 0 for any value of x

Answer 6

and 0+x = x for any value of x

Answer 7

Would y=0x+3 still be correct even if you don't simplify it on an exam?

Answer 8

y = 0x+3 is correct

Answer 9

Sometimes your teacher doesn't want you to fully simplify. It will depend on the teacher really.

Answer 10

Your question asks for

"the slope-intercept equation of the function f"

which means you should give your answer in functional notation:

$$\Huge f(x) = mx+b$$