Holly, maria and johnny went to a fair over spring break. holly paid $12.50 and went on one ride. maria paid $15.00 and went on two rides. johnny paid $20.00 and went on 4 rides. with x being the number of rides and y being the total amount paid, is the situation linear and why? no. between holly and maria there is an increase of $2.50 and between maria and johnny there is an increase of $5.00. yes. the y-intercept can be determined to be $10.00. yes. there is a constant rate of increase of $2.50 for each ride. no. we are not given the initial cost if they went on no rides.

Yes. There is a constant rate of increase of $2.50 for each ride.

Step-by-step explanation:

Lets write each persons cost and rides in the form y =mx+b

y being the total cost and x is the number of rides

Holly

(1 , 12.50)

Maria

(2,15)

Johnny

(4,20)

Lets calculate the slope

m = (y2-y1)/(x2-x1)

   = (20-15)/ (4-2)

  = 5/2

We can use the point slope form to determine b

y-y1 = m(x-x1)

y-20 = 5/2 (x-4)

Distribute

y-20 = 5/2x -20/2

Add 20 to each side

y-20+20 = 5/2x -10 +20

y = 5/2x +10

The slope or cost per ride is 2.50 and the y intercept is 10

my answer is$ 12

step-by-step explanation:

because 15 -2=12