The slope-intercept form of an equation is y mx b which defines a line. M and want to find other points on the line. Calculate the slope between the two points.
Back substitute the value of the slope and the solved value of the y -intercept into y mx b.
Make sure that the line is straight. This gives us the linear function. For this one they give you a point x1 y1 and a slope m and have you plug it into this formula. Substitute the known values into the slope-intercept formula and then solve for the unknown value of b.