Use the slope-intercept form with 100 as the y-intercept and 10 for the slope.
Practice makes perfect
When dealing with cost, the amount per week, $10, is a rate of change that gets multiplied by the independent variable, w, and the initial savings, $100, fixed price to be added once. Let's use T as the total money saved and w as the number of weeks.
T= 10w + 100
We can make a table of values to find points to plot. Our domain is a positive number of weeks, so we can start with w=1 and go up from there.
w
10w + 100
T
1
10( 1) + 100
110
2
10( 2) + 100
120
3
10( 3) + 100
130
Now, let's plot those points and connect them with a straight line.
