Question

write the equation of a line that includes the point (1,5) and has a slope of 3 in slope intercept form

Answer 1

y = mx + b
slope(m) = 3
(1,5)...x = 1 and y = 5
now we sub....and since we already know slope(m) and our points (x,y)...we need to find b, the y intercept.

y = mx + b
5 = 3(1) + b
5 = 3 + b
5 - 3 = b
2 = b

so your equation is : y = 3x + 2