Equations
Mr. B has 20 appless. He gives 2 away each week. Write an equation using, a, for apples and, T, for total.
T = 20 - 2a
Reading a graph from L to R... if the slope is positive, the line is going (up, down, straight)?
UP
9 ---> 0
7 ---> 2
9 ---> 4
NOT a function
Mr. B has 20 appless. He buys 3 more each week. Write an equation using, a, for apples and, T, for total.
T = 20 + 3a
Reading a graph from L to R... if the slope is negative, the line is going (up, down, straight)?
9 ---> 1
7 ---> 2
2 ---> 4
YES a function
Your cellphone plan costs a flat fee of $40 and then $0.50 per text. Write an equation for this where, C, is cost and, t, is text.
C = 40 + 0.5t
Reading a graph from L to R... if the slope is zero, the line is going (up, down, straight)?
straight
0 ---> 4
7 ---> 2
9 ---> 4
YES a function!