Let’s use the equation to help us make a prediction. Remember x represents the time in minutes, and y represents the temperature of the oven. What will the temperature of the oven be after 8 minutes? Start by substituting 8 minutes for x in the equation.

Question

y
=
30x
+
40
y
=
30
·
+
40

Answer 1

To find the temperature of the oven after 8 minutes, substitute \( x = 8 \) into the equation \( y = 30x + 40 \).

The equation becomes:

\[ y = 30(8) + 40 \]

Now calculate:

\[ y = 240 + 40 \] \[ y = 280 \]

So, the temperature of the oven after 8 minutes will be 280 degrees.