Question

Write and equation for each line.
Through (2,2) y-intercept 10

Answer 1

general formula of a straight line is y=ax+b
b is the y-intercept
y=ax+10
substitute the point (2,2) into the equation to find a
2=a(2) + 10
2=2a + 10
2-10=2a
-8=2a
a=-8/2
a=-4
substitute the value of a=-4 back into the original equation with the y-intercept

y=-4x+10, this is your final answer.

Answer 2

What if you had to find y then what would you do?

Answer 3

then they most likely would tell you the gradient, y-intercept and when x=3 find y

Answer 4

or something similar, it really dependso n the question.

Answer 5

Thank you!

Answer 6

no problem, medal thanks :)