Question

The growth of Trevor's lawn can be modeled by the equation y = .4x + 7, where the y is the height of the grass in centimeters, and x is the number of days since the lawn was last mowed.

what is the meaning of the y-intercept of this equation?

a) Trevor mows the lawn once every 7 days.

b) The lawn grows at a rate of 0.4 centimeters per day.

c) Right after the lawn is mowed, it is 7 centimeters tall.

d) The lawn grows 0.4 cm before each mowing

Answer 1

y = .4x + 7 creates ordered pairs of the type (x,y)

so at the y-intercept, it would be (0,7)
and what does (0,7) stand for ?
or
since x is the number of days since it was cut,
what would be x right after you cut the grass??

Answer 2

I need help