Question

For what value of a is (a,9) a solution for the equation y=2x+1?

A. 9
B. 8
C. 6
D. 4

Answer 1

Explanation:

(a,9).......we dont know " a " (or x) but we do know y...it is 9

so sub in 9 for y and solve for x

y = 2x + 1

9 = 2x + 1

9 - 1 = 2x

8 = 2x

8/2 = x

4 = x <======= ur answer is D