Question

100 POINTS ANSWER HURRY

Jonathan purchased 30 bags of mulch to spread in his garden. The graph shows points representing the number of bags of mulch left to spread at several different times while Jonathan is working.

Select from the drop-down menus to complete the equation, in standard form, that represents the relationship between the number of bags of mulch left to spread, y, and the time, x, Jonathan has spent mulching.

here are the choices: 1,9,10,30, 30, 21, 9, 1
make it into a equation with the choices

Answer 1

Here is my answer, 9x+y=30

Explanation:

Answer 2

So we want this in the form y = mx + b, the equation of a line.

First, since we have 2 points, we can calculate the slope:

m = (y₂ - y₁)/(x₂ - x₁)

m = (30 - 21)/(0-1)

m = -9

The slope is negative since the line is sloping downward.

To get the b value which is the y-intercept, we simply look at the graph and see where the line crosses the y axis. It crosses exactly at 30.

So the equation will be:

y = -9x + 30

You need -9 and 30.