Question

State the equation, in slope-intercept form, of each of the following graphs of linear relations.

Explain how the equation was determined.

Answer 1

Answer: y=80/5x+80

Explanation:

At one point graph goes from (0,400) to (25,800). So the y intercept is 400 because that’s where the line was at x=0. 0 to 25 is 25. 400 to 800 is 400. So the equation would be y=400/25x+400. But you can divide all of it by 5 to get y=80/5x+80.