The temperature is 56". The temperature decreases for hours. Each hour, the temperature decreases by 3' Then the temperature rises 12 in one hour. What is the temperature after 7 hour b

the two may have that, even a breakdown is probably offered

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).