answers
9 - A, D, E
question 9
A - correct
y = (3/4)x - 1/4
plug in -1 for the input (x)
y = (3/4) * -1 - 1/4 = -3/4 - 1/4 = -1
y = output = -1 so this is correct
B - incorrect
the y-intercept in a equation y = ax + c is (0,c)
c = -1/4, y-intercept = (0,-1/4)
this is not equal to (0,-1)
C - incorrect
y = (3/4)x - 1/4
plug in 1 for the input (x)
y = (3/4) * 1 - 1/4 = 3/4 - 1/4 = 2/4 = 1/2
y = output = 1/2
this is not equal to 1
D - correct
there is only an x-variable to the power of 1(3/4 x), and a constant (-1/4), so this is linear
E - correct
since this is linear with a defined slope, y is a function of x
question 10 - you are correct, B and E
you found the slope correctly, which was -3
so all the answers would have a slope of -3, which are B and E
you did this question correctly, good job : )