Question 19 Juliet is driving the same direction on a single highway for a road trip. When she starts her trip, she notices that she is at mile marker 225 and the mile markers are counting up as she drives. If she is driving $75 \mathrm{mph}$, write an equation that represents which mile marker she's at, $m$, after $h$ hours of driving. $m=225 h+75$

Step 1 ：Juliet is driving the same direction on a single highway for a road trip. When she starts her trip, she notices that she is at mile marker 225 and the mile markers are counting up as she drives.

Step 2 ：If she is driving $75 \mathrm{mph}$, we need to write an equation that represents which mile marker she's at, $m$, after $h$ hours of driving.

Step 3 ：The equation that represents which mile marker Juliet is at, $m$, after $h$ hours of driving is $m = 225 + 75h$

Step 4 ：\(\boxed{m = 225 + 75h}\)