Garrett found the slope of the values in the table

No, he should have put the x values in the denominator and the y values in the numerator

Step-by-step explanation:

The formula for calculate the slope is:

You can observe in the formula that the y values must be in the numerator and the x values must be in the denominator.

Then, the correct slope is:

Then, Garret's slope is incorrect, because  he should have put the x values in the denominator and the y values in the numerator.

80 the answer is 80

step-by-step explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).