Answer:

Step-by-step explanation:
The line passes through points 
Let 
Equation of a line passing through points
is given by 

So,

Put 

Answer:

Step-by-step explanation:
The equation in slope-intercept form is given by:

where
is the slope and
is the y-intercept.
The given line passes through so many points. We can use any two these points to find the slope of the line.
The line passes through
and
.
The slope is given by;
.
.
.
The y-intercept from the graph is 
Our equation finally becomes;

Answer:
15x + 150
Step-by-step explanation:
15x+ 150
15x= $ saved per week
+
150= what she has