Test 9 Section 4 Question 15

In this question, we’re given two points on a line and asked to find the equation. Conveniently, the line equations are in form, AKA slope-intercept form, so we can start by finding the slo—WAIT A MINUTE!

One of the points we’re given is , which is the line’s -intercept! Look at the answer choices—how many of them have 1 as the -intercept?

Only choice D! We’re done here.

…

If more than one choice had a -intercept of 1, you’d find the slope thusly: