Nolan plots the y -intercept of a line at 0 comma 3 on the y -axis. He uses a slope of 2 to graph another point. He draws a line through the two points. Which equation represents Nolan’s line?
Answer
A
y is equal to 3 x plus 5
B
y is equal to 2 x plus 1
C
y is equal to 2 x plus 3
D
y is equal to 3 x plus 2
Explanation
A line with y-intercept 3 has the form y = mx + 3. Nolan’s slope is 2, so substituting m = 2 gives y = 2x + 3. The matching choice is y is equal to 2 x plus 3.
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