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
I need help
The meaning of the y-intercept in this equation is the value of y when x is equal to zero. In this case, the y-intercept is 7.
The correct answer is: c) Right after the lawn is mowed, it is 7 centimeters tall.
To find the meaning of the y-intercept of the equation y = 0.4x + 7, we need to understand what the y-intercept represents in this context. The y-intercept is the value of y when x equals zero, so it tells us what happens at the starting point or when the lawn was last mowed.
In this equation, the y-intercept is 7, which means that right after the lawn is mowed, it is 7 centimeters tall. Therefore, the correct option is c) Right after the lawn is mowed, it is 7 centimeters tall.
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??