Question

Write the equation in slope-intercept form of the line that has a slope of -3 and contains the point(4,-5)

Answer 1

slope intercept form : y = mx + b
slope(m) = -3
(4,-5)...x = 4 and y = -5
now we use y = mx + b and sub in our stuff to find b, the y intercept.
-5 = -3(4) + b
-5 = -12 + b
-5 + 12 = b
7 = b

so your equation is : y = -3x + 7
any questions ?