Help please, and could you show the work?

X = 5

Step-by-step explanation:

use the graph:

look at y = -3 and find the corresponding X value (X = 5)

Graph the line using the slope and y-intercept, or two points.

Slope:  − 3

y-intercept:  ( 0 , 0 )  

x   y

0   0

1  − 3

Step-by-step explanation:

L(13) = 200

Step-by-step explanation:

Linear function:

A linear function has the following format:

In which m is the slope(how much y changes when x changes by 1) and b is the y-intercept(value of y when x = 0).

Finding the slope:

L (5) = 100 and L (9) = 150.

The slope is given by the change in the output(L, which is equals to y in the general formula) divided by the change in the input(x).

Change in the output: 150 - 100 = 50

Change in the input: 9 - 5 = 4

Slope:

So

L (5) = 100

So , which means that when , and we use this to find b.

So

a. Determine the value of L (13)

L when . So