Graphs like these (lines) come in the form y = mx + b where m is the slope and b is the y intercept. Y intercept is where the graph intersects the y axis so the value would be 5
Find the price and quantity
Qs=p2 + 2ps-15
Given is -
The variables y and x have a proportional relationship, and y = 5 when x = 4.

As we have to find the value of x when y= 8 so putting y = 8 in the above relationship, we get :



Hence, the answer is 6.4