Isaiah is having his house painted. He paid $525 for the required materials, and he will pay $30 an hour for the painters to complete the job. Which equation shows the relationship between y, the number of hours the painters work, and x, the total cost of the project?

y= 2x+7

changed to y= 5x +7

as slope is increased from 2 to 5

therefore it would be less steeper

so, option d) is correct

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12   1/4 degrees           12.25 degrees

= - = -3.5 degrees per hour

      3   1/2 hours               3.5 hours