The slope is negative one
Let, speed of 1st bicyclist is x.
So, speed of 2nd bicyclist is x-3 .
We know, relative speed when two objects moves towards each other :

Now, distance travelled in 3 hours is (98-2) miles .
So,

Therefore, speed of bikes are 17.5 mph and 14.5 mph.
Hence, this is the required solution.
C. y = 1/2x - 2
<u>Use the slope-intercept form to find the slope and y-intercept</u>
Slope: 1/2
Y-Intercept: -2