Question

Emily designed a robot that could climb down steps. She drew a graph to show the results from a test of her new robot.
The graph shows the number of steps remaining over time.
Complete the equation that represents Emily’s situation.
y = __x + __

I think it's y=-5/2x+15 .. but I'm most likely wrong .

Answer 1

@cwrw238

Answer 2

@ganeshie8

Answer 3

The y intercept you did, +15, is correct. However, the \(-\dfrac{5}{2}\) has a problem.

If you think of it as rise over run, or change in y over change in x, you can see this more clearly.


Where Y has gone down by -1, what has x changed by? Put that in the fractional form of: \(\dfrac{y}{x}\). You know the top, -1, so \(\dfrac{-1}{x}\) just fill in the bottom.