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 (0,5) and (1,8) lie on the line, the slope of the line is

8−5

1−0

=

3

1

=3 Therefore, the relationship between h and C can be represented by C=3h+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.