Question

What is the y- intercept of a line that has a slope of 3 and passes through point (-1,-7)

Answer 1

-4

Explanation:

took the test

Answer 2

-4

Explanation:

`\text {Using slope intercept form and the information provided: }y = 3x + b\\x = -1\\y = - 7\\\\\text{So: }`

`y = 3x + b \rightarrow -7 = 3(-1) +b`

Solve for B.

`-7 = 3(-1)+b\\3 * -1 = -3\\-7 = -3 + b`

`\text {Add 3 to both sides: } -7 +3 = -3(+3) +b\\\\-4 = b`

Your y-intercept should be -4.