Question

Which equation represents the relationship in the graph? giving brainliest!!!

Answer 1

A，the intercept is equal to 70

Answer 2

Answer:

a)  $y=-5x+70$

Step-by-step explanation:

Choose points on the line:  (0, 70) and (4, 50)

Let $(x_1,y_1)$ = (0, 70)

Let $(x_2,y_2)$ = (4, 50)

Use the slope formula to find slope: $m=\dfrac{y_2-y_1}{x_2-x_1}$

$\implies m=\dfrac{50-70}{4-0}=-5$

Use point-slope form of linear equation to find equation:

$\implies y-y_1=m(x-x_1)$

$\implies y-70=-5(x-0)$

$\implies y=-5x+70$