Answer: see below
Explanation:
QUESTION 6
To find the rate of change, or unit rate, from a table, divide y by x.
64/4= 16
112/7= 16
144/9= 16
208/13= 16
320/20= 16
(a). The rate of change is 16. In other words, Each (1) textbook costs 16 dollars.
(b). The equation is y=16x. This is because to find the cost of any given number of books (x), you just multiply whatever x stands for, by 16. Y stands for the total cost. For instance, in the first row, y=64, and x=4. using the equation y=16x, we can check to make sure 4 textbooks cost 64 dollars.
y=16x
64=16x4
64=64
Correct
QUESTION 7
(a). To find the rate of change from a graph, find the slope. the slope is the same thing as a unit rate, and its formula is Rise÷run.
How to do this?:
First we need to find 2 points. Explained below:
Rise: 50
Run: 2
50/2= 25
Answer=25