Simply, the question wants you to write an equation for the points they gave you.
The points are:
(0,60)
(1,65)
(2,70)
(3,75)
The first thing we need to do is to find the slope.
[tex]\sf{Slope =\frac{y_2-y_1}{x_2-x_1} =\frac{65-60}{1-0} =\frac{5}{1} =\boxed{\bf{5}}[/tex]
The slope is 5.
If we write an equation in the form of y = mx + b, where m is the slope, and b is the y-intercept, we would have so far:
y = 5x + b
Now, we need to find the y-intercept.
We are given the point (0,60)
That point lies on the y-axis, and therefore, 60 is the y-intercept.
Our final equation is y = 5x + 60.
