So just switch x and y to get:

and solve for x.
so f(-1) = x = 2y -10
Slope intercept form:
y=mx+b
m=slope
b=y-intercept:
We Know the slope (m=2)and we have a point (4,2) then:
x₀=4
y₀=2
we have to find "b"
y=mx+b
2=2(4)+b
8+b=2
b=2-8
b=-6
Therefore:
if b=-6 and m=2; the equation in slope intercept form would be:
y=2x-6
<span>Answer: y=2x-6</span>
Answer:
RS = 75.3
Step-by-step explanation:
You need to set up the proportion of corresponding sides.


7(RS) = 31(17)
= 527
RS = 527/7 = 75.2857...
= 75.3
Answer:
-9/4
Step-by-step explanation:
A perpendicular slope is on that is the negative reciprocal. current slope=4/9 and the negative recipocal is -9/4.