5Answer:
Explanation:
Let the first session be y =20 + 30x .................. equation 1
Let the second session be y = 10 + 35x .............. equation 2
equate the two functions
20 + 30x = 10 + 35x
y = 20 - 10 +30x - 35x
y = 10 -5x
Find the y intercept (that is where y = 0)
10-5x = 0
5x =10
x = 2
substitute x = 2 into equation 1 and 2
y =20 + 30(2) = 80
y = 10 + 35(2) =80
Notice that when you plot the graph for equ. 1 and equ. 2 , it intercepts at x =2 and y =80 (2, 80)