Question

y = -5x + 5

y = -1/5 x + 5

y = 1/5x + 5

y = 5x + 5

Answer 1

Okay, the slope is negative, because when you move 1 unit to the right on the x-axis, the y-value drops 5. If the y-value drops as x-increases, you've got a negative slope. The value of the slope is the change in y divided by the change in x. Here we've got a change of -5 in y divided by a change of 1 in x, so the slope is -5. Slope-intercept form for a line is y = mx + b where m is the slope and b is the y-intercept (the value of y when x = 0). Which of those equations fits what we know?

Answer 2

y = -5x + 5

Answer 3

A?

Answer 4

Yes

Answer 5

Will you explain?

Answer 6

I thought I already did :-)

We found the slope to be -5 by looking at the graph and observing that when we went from x = 0 to x = 1, the the value of y went from y = 5 to y = 0, a change of -5 in a distance of 1, -5/1 = -5. The y-intercept is 5, because at x = 0, y = 5. All we need to do is plug those into y = mx + b, giving us y = -5x + 5 as the equation of the line shown.

Answer 7

Ok now I see, Thank you :)

Answer 8

Are you sure? I'm happy to try explaining it a different way, if you aren't convinced you understand what I did.