Question

Which equation matches the graph?

The graph of a diagonal line on a coordinate plane going up from left to right that passes through the points zero comma negative 4 and 2 comma 2.
A. f(x) = 2x – 4
B. f(x) = –3x – 4
C. f(x) = 3x – 4
D. f(x) = 4x + 2

Answer 1

Find the slope: (2 − (−4)) / (2 − 0) = 6/2 = 3. The y-intercept is −4, so the equation is f(x) = 3x − 4. Answer: C.