The graph of a function must be linear if it has what characteristic? A. It passes through the origin
B. It crosses the x-axis more than once.
C. It crosses the y-axis exactly once
D. It has a constant slope.

D. It has a constant slope.

Step-by-step explanation:

We have to find the characteristic which states that the graph of a function must be linear.

The four characteristics given in the question are;

A. It passes through the origin

B. It crosses the x-axis more than once.

C. It crosses the y-axis exactly once

D. It has a constant slope.

If we consider the first characteristic that it passes through the origin , then the graph of a function will not be linear because it will contain two variables.

If we consider the second characteristic that it crosses the x-axis more than once , then the graph of a function will not be linear because it will then be a parabola or a curve function and will not have a linear function.

If we consider the third characteristic that it crosses the y-axis exactly once , then the graph of a function will not be linear because it may cross the x-axis twice.

If we consider the fourth characteristic that it has a constant slope , then the graph of a function will be linear because it will not change it's form and will have a constant slope linear function.

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24

8

step-by-step explanation: