Answer:
equation is y= 50 + 3f
57F
15 Minutes
Explanation:
a) the equation above because 50 is the starting temp and every 3 minutes is another degree F
b) if the temp rises 1 degree every 3 minutes, then 21/3 is 7 degrees hotter plus 50, which is 57 F.
c) if 50 plus 3f is the equation, then 3 times 5 will make 55 degrees. After 15 minutes, the temp will be 55 F.