SATMathematics Practice Test 1

The relationship between h and C is represented by any equation of the given line. The C-intercept of the line is 5. Since the points $\left(0,5\right)$ and $\left(1,8\right)$ lie on the line, the slope of the line is $\frac{8-5}{1-0}=\frac{3}{1}=3$ Therefore, the relationship between h and C can be represented by $\mathit{C}=3\mathit{h}+5$, theslope-intercept equation of the line.
Choices A and D are incorrect because each uses the wrong values for both the slope and intercept. Choice B is incorrect; this choice would result fromcomputing the slope by counting the number of grid lines instead of using the values represented by the axes.