4, I cannot fail this if I do I have a F in math!! Please make sure u know it’s correct I can’t do it alone.

X= -45

Step-by-step explanation:

If graphed on desmos, the line touches the x axis at (-45,0)

Also, if in the equation you substitute y for 0, then you will get -45

Do you still need answers to the rest of your questions? I'll help u pass your test if u need

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is