Question

Which equation has a graph that includes the point (4.5, 14)? Select all that apply.

A. y = 2x + 5
B. y = 3x + 1.5
C. y = 4x – 4
D. y = 5x – 8.5
E. y =1/2 x + 10

Answer 1

D. y = 5x - 8.5 AND C. y = 4x - 4

Explanation:

You can test to see which equation includes (4.5, 14) by substituting 4.5 for x in each equation. Since more than one answer could be correct, test each equation. To test D, for example, you would do this:

1. y = 5x - 8.5
2. y = 5(4.5) - 8.5
3. y = 22.5 - 8.5
4. y = 14