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4-84.

In Spring, the daily high temperature in Boulder, Colorado rises about 1/3 degree per day. On Friday, May 2, the temperature reached 74°. Predict when the temperature will reach 90°. Homework Help ✎

Using the equation y = mx + b, put the word problem into equation form.

What is the growth rate?

What is the starting point?

What is the desired temperature?

Now, solve for x.

48 days later
(Thursday, June 19).