Robert pays for his family to go bowlins

Write and solve a real word problem that involves determining distance on a coordinate plane

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

If f(x)=3 over x+2 - square root x-3 then f(7)=