Question

A line passes through the points (4,19) and (9,24). Write a linear function in the form y =Mx+b for this line

Answer 1

Slope = y2-y1 / x2-x1
= 24-19/9-4
= 5/5
= 1

solve for b
y=1x+b
19=1(4)+b
19=4+b
15=b

the equation of the line is y=x+15