Write an Equation for the Linear Function and Use It $\mathrm { r } = 7 + 0.8 \mathrm { t } ; 11.25$

Multiple Choice

Write an equation for the linear function and use it to answer the given question.
-You can rent time on computers at the local copy center for a $7 setup charge and an additional $4 for every 5 minutes. How much time can you rent for $16?

A) $\mathrm { r } = 7 + 0.8 \mathrm { t } ; 11.25$ minutes
B) $r = 7 t + 0.8 ; 2.17$ minutes
C) $\mathrm { r } = 7 \mathrm { t } - 0.8 ; 2.4$ minutes
D) $\mathrm { r } = 7 - 0.8 \mathrm { t } ; 28.75$ minutes